ASUS UX533 laptop fan not working

[Arntor]

I have a dual-boot system with windows and Mint 19.2.
Under windows the laptop fan is spinning quite loud.
Under Mint it is not spinning at all and the CPU sometimes reaches 70-80 degrees, which is a lot, and the bottom of the laptop is always very hot

the "sensors" command doesn't see a fan at all, this is the output:

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coretemp-isa-0000
Adapter: ISA adapter
Package id 0:  +47.0°C  (high = +100.0°C, crit = +100.0°C)
Core 0:        +45.0°C  (high = +100.0°C, crit = +100.0°C)
Core 1:        +45.0°C  (high = +100.0°C, crit = +100.0°C)
Core 2:        +47.0°C  (high = +100.0°C, crit = +100.0°C)
Core 3:        +46.0°C  (high = +100.0°C, crit = +100.0°C)

the "pwmconfig" command says:

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There are no pwm-capable sensor modules installed

inxi:

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System:
  Host: misho-ZenBook-UX533FN-UX533FN Kernel: 5.0.0-27-generic x86_64 
  bits: 64 compiler: gcc v: 7.4.0 Desktop: Cinnamon 4.2.4 
  Distro: Linux Mint 19.2 Tina base: Ubuntu 18.04 bionic 
Machine:
  Type: Laptop System: ASUSTeK product: ZenBook UX533FN_UX533FN v: 1.0 
  serial: <filter> 
  Mobo: ASUSTeK model: UX533FN v: 1.0 serial: <filter> 
  UEFI: American Megatrends v: UX533FN.302 date: 03/29/2019 
Battery:
  ID-1: BAT0 charge: 51.4 Wh condition: 69.1/73.0 Wh (95%) 
  model: ASUSTeK ASUS Battery status: Discharging 
CPU:
  Topology: Quad Core model: Intel Core i7-8565U bits: 64 type: MT MCP 
  arch: Kaby Lake rev: B L2 cache: 8192 KiB 
  flags: lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 31872 
  Speed: 500 MHz min/max: 400/4600 MHz Core speeds (MHz): 1: 500 2: 500 
  3: 500 4: 500 5: 500 6: 500 7: 500 8: 500 
Graphics:
  Device-1: Intel vendor: ASUSTeK driver: i915 v: kernel bus ID: 00:02.0 
  Device-2: NVIDIA vendor: ASUSTeK driver: N/A bus ID: 02:00.0 
  Display: x11 server: X.Org 1.19.6 driver: modesetting unloaded: fbdev,vesa 
  resolution: 1920x1080~60Hz 
  OpenGL: renderer: Mesa DRI Intel HD Graphics (Whiskey Lake 3x8 GT2) 
  v: 4.5 Mesa 19.0.8 direct render: Yes 
Audio:
  Device-1: Intel vendor: ASUSTeK driver: snd_hda_intel v: kernel 
  bus ID: 00:1f.3 
  Sound Server: ALSA v: k5.0.0-27-generic 
Network:
  Device-1: Intel driver: iwlwifi v: kernel port: 5000 bus ID: 00:14.3 
  IF: wlo1 state: up mac: <filter> 
Drives:
  Local Storage: total: 238.47 GiB used: 25.51 GiB (10.7%) 
  ID-1: /dev/nvme0n1 vendor: Kingston model: RBUSNS8154P3256GJ2 
  size: 238.47 GiB 
Partition:
  ID-1: / size: 82.56 GiB used: 25.48 GiB (30.9%) fs: ext4 
  dev: /dev/nvme0n1p4 
Sensors:
  System Temperatures: cpu: 43.0 C mobo: N/A 
  Fan Speeds (RPM): N/A 
Info:
  Processes: 260 Uptime: 1m Memory: 7.60 GiB used: 1.24 GiB (16.3%) 
  Init: systemd runlevel: 5 Compilers: gcc: 7.4.0 Shell: bash v: 4.4.20 
  inxi: 3.0.32 

[LanceM]

Have you updated the laptop's motherboard firmware to the newest version. Asus supplies a bootable OS independent update for your laptop.
I think this is probably the right one, although it says its for 15 UX533FD
Version 304
2019/07/015.14 MBytes
BIOS 304
Optimize system performance

[Arntor]

yes, i updated the BIOS, no change. Also inside there is no display or setting for the fan speed unfortunately.

[deepakdeshp]

yes, i updated the BIOS, no change. Also inside there is no display or setting for the fan speed unfortunately.

There may be Fan always on setting in BIOS. I have it, though the BIOS is different.

[Arntor]

Unfortunately there is no such setting.

Hm could this possibly be related to secure boot and not turning it off?

[deepakdeshp]

Unfortunately there is no such setting.

Hm could this possibly be related to secure boot and not turning it off?

No it's not. You can clean the fan physically and see that nothing obstructs it. That the lint is cleaned.

[mwild]

Same issue here (same laptop but using Ubuntu).

Some new idea about that?

[glantucan]

Hi I had the same problem with my Asus UX433FA.
I solved it by installing a different kernel. i went to the Update Manager -> View -> Linux kernels -> and installed the latest supported (5.0.0-31)
After restarting the problem was solved, and also some other minor ones, like the function keys not working properly.
Hope this helps

[LanceM]

Hi I had the same problem with my Asus UX433FA.
I solved it by installing a different kernel. i went to the Update Manager -> View -> Linux kernels -> and installed the latest supported (5.0.0-31)
After restarting the problem was solved, and also some other minor ones, like the function keys not working properly.
Hope this helps

Good idea, but he's got 19.2 and if updated current it should have that very kernel. Maybe he should update as his output shows 5.0.0-27-generic x86_64

[Arntor]

Unfortunately that version and also the latest available kernel 5.3.0-24 still isn't fixing the issue

[Arntor]

Good news - the newest kernel now 5.3.0-46 finally fixes this and the fan is now working

[deepakdeshp]

Glad to know that the problem is solved.